1. Which of the following is NOT a type of capacitor?
A. Ceramic capacitor
B. Electrolytic capacitor
C. Inductive capacitor
D. Tantalum capacitor
Answer: C. Inductive capacitor
2. Which type of capacitor is polarized?
A. Ceramic capacitor
B. Electrolytic capacitor
C. Mica capacitor
D. Film capacitor
Answer: B. Electrolytic capacitor
3. Tantalum capacitors are preferred for:
A. High-frequency applications
B. Low-voltage applications
C. Large capacitance in small sizes
D. High-temperature environments
Answer: C. Large capacitance in small sizes
4. Which type of capacitor is typically used in high-frequency applications?
A. Ceramic capacitor
B. Electrolytic capacitor
C. Tantalum capacitor
D. Paper capacitor
Answer: A. Ceramic capacitor
5. Which capacitor has the highest energy storage capacity for a given size?
A. Film capacitor
B. Ceramic capacitor
C. Supercapacitor
D. Mica capacitor
Answer: C. Supercapacitor
6. When a capacitor is fully charged, the voltage across it is:
A. Equal to the supply voltage
B. Zero
C. Twice the supply voltage
D. Infinite
Answer: A. Equal to the supply voltage
7. The time constant of a capacitor is given by:
A. τ=R×C\tau = R \times C
B. τ=R/C\tau = R / C
C. τ=R+C\tau = R + C
D. τ=R−C\tau = R – C
Answer: A. τ=R×C\tau = R \times C
8. During the charging of a capacitor, the current through the capacitor:
A. Increases exponentially
B. Decreases exponentially
C. Remains constant
D. Becomes zero instantly
Answer: B. Decreases exponentially
9. During the discharging of a capacitor, the voltage across it:
A. Increases exponentially
B. Decreases exponentially
C. Remains constant
D. Becomes zero instantly
Answer: B. Decreases exponentially
10. In an RC circuit, the voltage across the capacitor during charging is given by:
A. Vc=V0e−t/RCV_c = V_0 e^{-t/RC}
B. Vc=V0(1−e−t/RC)V_c = V_0 (1 – e^{-t/RC})
C. Vc=V0+e−t/RCV_c = V_0 + e^{-t/RC}
D. Vc=et/RCV_c = e^{t/RC}
Answer: B. Vc=V0(1−e−t/RC)V_c = V_0 (1 – e^{-t/RC})
11. Capacitors are used in electronic circuits to:
A. Store energy
B. Block DC and allow AC
C. Smooth voltage fluctuations
D. All of the above
Answer: D. All of the above
12. Which type of capacitor is typically used for energy storage in renewable energy systems?
A. Ceramic capacitor
B. Film capacitor
C. Supercapacitor
D. Mica capacitor
Answer: C. Supercapacitor
13. Capacitors are used in power supply circuits to:
A. Amplify signals
B. Filter ripples in the output
C. Generate DC from AC
D. Store charge permanently
Answer: B. Filter ripples in the output
14. In audio circuits, capacitors are often used to:
A. Block low-frequency signals
B. Block high-frequency signals
C. Couple or decouple signals
D. Amplify sound signals
Answer: C. Couple or decouple signals
15. Which of the following is NOT a typical application of capacitors?
A. Tuning circuits
B. Energy storage
C. Current amplification
D. Power factor correction
Answer: C. Current amplification